If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

Which city is three-fifths chick two third cat and 50% goat?

A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?

Why is it very easy to weigh a fish?

What does this Rebus Picture mean?

100 prisoners are stuck in the prison in solitary cells. The warden of the prison got bored one day and offered them a challenge. He will put one prisoner per day, selected at random (a prisoner can be selected more than once), into a special room with a light bulb and a switch which controls the bulb. No other prisoners can see or control the light bulb. The prisoner in the special room can either turn on the bulb, turn off the bulb or do nothing. On any day, the prisoners can stop this process and say "Every prisoner has been in the special room at least once". If that happens to be true, all the prisoners will be set free. If it is false, then all the prisoners will be executed. The prisoners are given some time to discuss and figure out a solution. How do they ensure they all go free?

Two boys wish to cross a river. The only way to get to the other side is by boat, but that boat can only take one boy at a time. The boat cannot return on its own, there are no ropes or similar tricks, yet both boys manage to cross using the boat.

How?

81 x 9 = 801. What must you do to make the this equation true?

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

How can you tell a raw egg from a hard-boiled egg?